Dear Postfix admins, What's the best way to rate limit our outbound mail rate ? We're using an upstream spam / virus service to filter our outbound email but they sometimes block us, when we are sending too much mail. We have been advised to send no more than 50 messages per connection, and to use fewer than 50 concurrent connections. What's the best way to achieve this in postfix?
We're using postfix 2.10.2 We have a transport map, with some local transport rules, and then a match all rule sending * : smtp:relayhost.upstream.com My question is can I acheive this outflow rate limiting with the smtp_destination_concurrency limits, or should I be using the equavellent relay_destination_concurrency_limit or some other configuration ? smtp_destination_concurrency_limit = 40 smtp_destination_recipient_limit = 40 relay_destination_concurrency_limit = 40 relay_destination_recipient_limit = 40 Thanks Paul
